Elevation, degradation, specialization, generalization

While studying foreign languages students usually face a problem of understanding the meaning of the word. We all know a saying “one word – one meaning” and we also know that it can’t be used to characterize the lexical system of the English language. In order to help students to be word-conscious the course of lexicology was included to the curriculum for the English sections of all linguistic departments.
Lexicology (of Greek origin: lexis “word” + logos “learning”) is a brunch of linguistics concerned with words. It is a study of words.